Merge pull request #11964 from nathanielmanistaatgoogle/grpc_testing

.pylintrc

src/python/grpcio_testing/grpc_testing/__init__.py

src/python/grpcio_testing/grpc_testing/_channel/__init__.py

src/python/grpcio_testing/grpc_testing/_channel/_channel.py

...thon/grpcio_testing/grpc_testing/_channel/_channel_rpc.py

...on/grpcio_testing/grpc_testing/_channel/_channel_state.py

...ython/grpcio_testing/grpc_testing/_channel/_invocation.py

...n/grpcio_testing/grpc_testing/_channel/_multi_callable.py

...python/grpcio_testing/grpc_testing/_channel/_rpc_state.py

src/python/grpcio_testing/grpc_testing/_common.py

src/python/grpcio_tests/setup.py

src/python/grpcio_tests/tests/testing/_application_common.py

...grpcio_tests/tests/testing/_application_testing_common.py

src/python/grpcio_tests/tests/testing/_client_application.py

src/python/grpcio_tests/tests/testing/_client_test.py

src/python/grpcio_tests/tests/testing/proto/__init__.py

src/python/grpcio_tests/tests/testing/proto/requests.proto

src/python/grpcio_tests/tests/testing/proto/services.proto

src/python/grpcio_tests/tests/tests.json